Fix #1027

Note:
For testing purposes you can use my fork of the Kubewarden helm charts.

This PR refactors the creation and editiong of policies by shifting from ArtifactHub based templates to a new Policy Chart model.

In addition, several UI components (tables, forms, and editors) have been updated and migrated many components (e.g. admission, Config, Create, PolicyReadmePanel, PolicyTable, Values) to use the <script setup lang="ts"> syntax.

Policy Chart Integration

• Removed the ArtifactHub integration module and replaced it with a new policyChart module:
• The new module provides functions to extract resource annotations and determine whether a policy targets global (non-namespaced) resources.
• Updated components and methods (in Create.vue, Config.vue, and PolicyReadmePanel.vue) to fetch policy details from Policy Charts rather than ArtifactHub packages.
• Introduced new types/interfaces (PolicyChart and PolicyDetail) to represent policy charts and their associated metadata.
• A new set of annotations will now be added to a policy created from the UI to help with fetching the Chart questions when in edit mode:
  • kubewarden.io/chart-key
  • kubewarden.io/chart-name
  • kubewarden.io/chart-version
    • If any of these annotations are missing the UI will attempt to find a matching chart based on the module, if not found it will just show the yaml editor for settings.

Necessary Policy chart changes

In order to have the Policy Helm charts displayed correctly within the UI, we need to have a few annotations added to each policy:

  catalog.cattle.io/ui-component: kubewarden # This is added for custom UI deployment of a chart
  catalog.cattle.io/hidden: 'true' # Hide the chart from the catalog chart page
  # catalog.cattle.io/requires-gvr: "policyservers.policies.kubewarden.io/v1" # Declare that this chart provides a type, which other charts may use in `requires-gvr`. Only add to parent, not CRD chart.

  # We can use the `type` annotation to control where the chart is available, which we can define as a Kubewarden Policy
  catalog.cattle.io/type: kubewarden-policy

  # Annotations needed for the UI
  kubewarden/displayName: <policy-displayName>
  kubewarden/mutation: 'true|false'
  kubewarden/contextAwareResources: 'true|false'
  kubewarden/resources: <comma-separated-string>

• The description and keywords of the chart should also match what we used in the artifacthub-pkg.yaml.